[PATCH] D47995: [ASAN] fix startup crash in dlsym for long paths since glibc 2.27

[Vitaly Buka via Phabricator via llvm-commits]

vitalybuka added inline comments.


================
Comment at: lib/asan/asan_malloc_linux.cc:58
+  void *prev_mem = (void*)&alloc_memory_for_dlsym[prev_offset];
+  if (prev_mem == ptr) {
+    REAL(memset)(prev_mem, 0, last_dlsym_alloc_size_in_words * kWordSize);
----------------
Alternative, more general solution is to have some bitmap which tells if byte is allocated. And then trim the tail on each free.



Repository:
  rCRT Compiler Runtime

https://reviews.llvm.org/D47995